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GLONASS current status and update programme Roman Muravyev, head of the GLONASS General Desigher administration. Information and analysis centre for PNT CONTENTS NATIONAL SATELLITE NAVIGATION POLICY GLONASS STATUS GLONASS

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SLIDE 1

GLONASS current status and update programme

Roman Muravyev, head of the GLONASS General Desigher administration. Information and analysis centre for PNT

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SLIDE 2

CONTENTS

  • NATIONAL SATELLITE NAVIGATION POLICY
  • GLONASS STATUS
  • GLONASS CONSTELLATION SUSTAINMENT
  • SPACE SEGMENT MODERNIZATION
  • GLONASS AUGMENTATIONS
  • GNSS MONITORING AND PERFORMANCE ASSESSMENT SYSTEM
  • GLONASS REFERENCE DOCUMENTS
  • GLONASS USER INFORMATION SUPPORT
  • SUMMARY

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SLIDE 3
  • Presidential Decree of May 17, 2007 No. 638 “On Use of GLONASS (Global Navigation

Satellite System) for the Benefit of Social and Economic Development of the Russian Federation”

  • Federal Programme on GLONASS Sustainment, Development and Use for 2012-2020 –

planning and budgeting instrument for national PNT activities

  • Programme governance:
  • Programme Goals:
  • Improving system performance in terms of accuracy and integrity
  • Ensuring guaranteed positioning, navigation and timing solutions in restricted visibility, interference and

jamming conditions

  • Enhancing current application efficiency and broadening application domains

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NATIONAL SATELLITE NAVIGATION POLICY AND ORGANIZATION

Ministry of Defense

Programme Scientific and Coordination Board

Federal Agency of Scientific Organizations Federal Agency of Marine and Inland Water Transportation Federal Agency

  • f Air Transportation

Federal Agency on Technical Regulating and Metrology Ministry of Industry and Commerce Federal Service for State Registration, Cadastre and Cartography Ministry of Transportation Federal Service for Supervision on Transport EMERCOM Ministry of Internal Affairs

Government Contracting Authority – Programme Coordinator

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SLIDE 4

SPACE-BASED AUGMENTATIONS 24 reference stations in Russia 8 reference stations abroad

In total 27 Operational 23 Maintenance 1 Orbital spares 2 Flight testing 1

Glonass-M Glonass-K

FUNDAMENTAL FACILITITES 3 Telescopes (32 m) 2 Telescopes (7 m) 3 Correlators 1 Cold-atom Optical Frequency Reference 50 Astronomic and Geodetic Network Stations

SDCM GEO satellites

геостационарной орбите

MEO Satellites

REGIONAL AND LOCAL AUGMENTATIONS 77 stations of Ministry of Transportation 4104 stations of Federal Service for State Registration, Cadastre and Cartography GROUND CONTROL COMPLEX 2 System Control Centers 9 Reference Stations 6 Uplink Stations 3 Laser Ranging Stations

I II III

1 4 5 13 12 11 23 24 19 20 21 22 3 17 2

701

  • 05

747

  • 04

730

+01

8 7 6

733

  • 04

745

+05

743

+06

744

+05

742

+06

15

715

  • 07

716

+00

736

  • 01

717

  • 07

723 737

  • 01

721

  • 02

732

+03

735

+02

754

  • 03

720

+03

719

+02

731

  • 03

10

755

+04

14 18 16 20

702

  • 06

9

734

+01

751

+04

17 714

753

+00

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In total 3 Operational 2 Maintenance 1

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GLONASS STATUS

(as of 6 December 2016)

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SLIDE 5

CURRENT STATUS OF GLONASS TIMESCALE AND UTC(SU) BROADCAST ACCURACY #

  • before Aug. 2014 ~400 ns offset between GLONASS

Time and UTC(SU)

  • in compliance with Specs
  • but stopped meeting growing requirements of

timing users

  • Aug. 18, 2014 – start of correction activities
  • 2015 – offset kept within 35 ns
  • 1st half of 2016 – offset kept within 25 ns
  • before Aug. 2014 ~200 ns UTC(SU) broadcast

correction systematic error

  • Aug. 18, 2014 – start of correction activities
  • Aug. 2014 – Jun. 2016 – UTC(SU) broadcast error is

within 10 ns

  • 2nd half of the 2016 – malfunctions of the Central

Synchronizer GLONASS System Time Generation disturbances increased offset to UTC(SU)

  • GLONASS Timescale is being corrected with an increment
  • f ~ 2 ns per day by changing the control correction
  • by the end of 2016:
  • GLONASS Time Offset relative to UTC(SU) is

expected to reach ± 20 ns

  • UTC(SU) broadcast error is expected to reach ± 5 ns

GLONASS time offset relative to UTC(SU) UTC(SU) broadcast error ns ns

GLONASS Time τс UTC(SU)

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SLIDE 6

Year 2016 2017 2018 I II III IV I II III IV I II III IV Total in constellatio n 28 28 27 25 25 24 24 24 24 24 24 25 Operational 24 24 24 24 24 24 24 24 24 24 24 24

⇑

51 53 56 57 58 52 59 60 61

Glonass-M

  • 2 Glonass-M satellites decommissioned in

2016

  • 2 Glonass-M satellites launched (07 Feb 16

and 29 May 16)

  • a number of block M sats operate beyond

their design life

  • 7 Glonass-M sats in ground stock to be

launched in 2016-2018 to replace those well beyond their design life Glonass-K

  • 2 Glonass-K in orbit
  • 1 undergoing flight testing
  • 1 commissioned in Feb 2016, operational

Current constellation and ground spares will provide robust system operation until new-generation satellites FOC

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GLONASS CONSTELLATION SUSTANMENT

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SLIDE 7

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SPACE SEGMENT MODERNIZATION

Glonass-K Satellites

  • Signals: L1/L2OF, L1/L2SF, L3OC
  • 10 year design life
  • Cs, Rb onboard clocks – 1Х10-13
  • Unpressurized platform
  • Enhanced service systems
  • Advanced satellite command and

control, ODTS

  • SaR payload

Enhanced Glonass-K

  • Signals: L1/L2OF, L1/L2SF,

L1/L2OC, L1/L2SC, L3OC

  • 2 phased-array antennas (for FDMA

and CDMA signals)

  • New message structure
  • Enhanced antijam capabilities of new

CDMA signals

  • Experimental clock – 5х10-14–5х10-15
  • Onboard one-way laser ranging
  • More frequent ephemeris and clock

data uploads, optical crosslinks

  • 12.5 year design life
  • SaR

Glonass-K Evolution (К2)

  • Single phased-array antenna for

L1/L2/L3 FDMA and CDMA signals

  • Advanced clocks – 5х10-14–5х10-

15

  • Design to be finalized by the end

2016

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SLIDE 8
  • All types of augmentations to support all

types of high accuracy services developed and continue to expand

GEO

INTERNET L1/L3 GLONASS L1/L5 SBAS NTRIP BROADCASTING FACILITIES GNSS CONSTELLATION DATA PROCESSING FACILITY

  • Master Center
  • Back-Up Center

GLOBAL MONITORING NETWORK

  • network densification
  • space segment modernization
  • coverage extension

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GLONASS AUGMENTATIONS

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SLIDE 9
  • Independent monitoring and

verification of performance characteristics versus system requirements documents

  • f

GLONASS and its constituent parts

  • Generating input data to

assess GLONASS Program KPIs

  • Determining

GLONASS performance at user level

  • Calculating input data for

GLONASS certification

GNSS CONSTELLATION

LASER RANGING STATIONS NETWORK MONITORING STATIONS NETWORK Mobile Instrumental Diagnostics Lab

INFORMATION SHARING SUBSYSTEM CALCULATION, ANALYSIS AND CONTROL SUBSYSTEM DATA GENERATION SUBSYSTEM REFERENCE STATION

GNSS MONITORING AND PERFORMANCE ASSESSMENT SYSTEM CENTER INTERNET

SIGNAL CHARACTERISTICS ASSESSMENT FACILITIES

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PERFORMANCE MONITORING AND ASSESSMENT SYSTEM

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SLIDE 10

4 GLONASS REFEENCE DOCUMENTS ARE TO BE RELEASED IN Q-4 2016

  • Interface Control Document “General Description of the GLObal

NAvigation Satellite System with the Code Division Multiple Access Signals”

  • Interface Control Document “GLONASS L1 Open Service Code

Division Multiple Access Signal”

  • Interface Control Document “GLONASS L2 Open Service Code

Division Multiple Access Signal”

  • Interface Control Document “GLONASS L3 Open Service Code

Division Multiple Access Signal”

Type of difference FDMA signal reference documents CDMA signal reference documents

Variable number of SVs 0 to 24 0 to 63 Message structure Fixed structure “superframe/frame/string” Continuous sequence of strings, non-fixed length, variable composition depending on the number of

  • perational SVs,

types of strings can be added, backward compatibility with receivers currently in use Time stamp length 30 bits 12 bits Value of LSB 0.4 m 0.001 m Signal health status periodicity 1 per 4 sec 1 per 2 sec for L1 and L2 1 per 3 sec for L3

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GLONASS REFERENCE DOCUMENTS

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SLIDE 11

WWW.GLONASS-IAC.RU

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GLONASS USER INFORMATION SUPPORT

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  • GLONASS budgeting is planned through 2020, planning

for the next period is underway

  • Orbital constellation + Glonass-M ground spares will

provide robust system operation until more new generation satellites come into service

  • Phased approach to space segment modernization
  • Activities

focused at performance improvement underway

  • All types of augmentations developed and continue to

expand

  • 4 GLONASS reference documents are approved and to

be publicly released in the nearest future

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SUMMARY

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SLIDE 13

Thank you!

Information and Analysis Center for PNT

Tel./fax: +7 (495) 513-41-39 www.glonass-iac.ru

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